دانلود رایگان پاورپوینت شبکه پتری (انگلیسی)

Basics of Petri Nets
Petri net consist two types of nodes: places and transitions. And arc exists only from a place to a transition or from a transition to a place.
A place may have zero or more tokens.
Graphically, places, transitions, arcs, and tokens are represented respectively by: circles, bars, arrows, and dots.
Below is an example Petri net with two places and one transaction.